National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fair

67°F

19°C

Humidity 73%
Wind Speed SE 7 mph
Barometer 30.00 in (1015.4 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 11 Oct 10:51 am CDT
Extended Forecast for

Zion IL

  • Today

    Today: Sunny, with a high near 71. South southeast wind around 10 mph.

    High: 71 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 60. South southwest wind 5 to 10 mph.

    Low: 60 °F

    Increasing
    Clouds

  • Columbus Day

    Columbus Day: Mostly sunny, with a high near 83. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 83 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms between 9pm and 1am. Partly cloudy, with a low around 66. South southwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 66 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: Mostly sunny, with a high near 76. West southwest wind 10 to 15 mph becoming north northwest in the afternoon. Winds could gust as high as 20 mph.

    High: 76 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 55.

    Low: 55 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: A 20 percent chance of showers. Mostly cloudy, with a high near 66.

    High: 66 °F

    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 52.

    Low: 52 °F

    Mostly Cloudy

  • Thursday

    Thursday: A chance of showers. Mostly cloudy, with a high near 64.

    High: 64 °F

    Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 71. South southeast wind around 10 mph.
Tonight
Increasing clouds, with a low around 60. South southwest wind 5 to 10 mph.
Columbus Day
Mostly sunny, with a high near 83. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Monday Night
A slight chance of showers and thunderstorms between 9pm and 1am. Partly cloudy, with a low around 66. South southwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Tuesday
Mostly sunny, with a high near 76. West southwest wind 10 to 15 mph becoming north northwest in the afternoon. Winds could gust as high as 20 mph.
Tuesday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 55.
Wednesday
A 20 percent chance of showers. Mostly cloudy, with a high near 66.
Wednesday Night
Mostly cloudy, with a low around 52.
Thursday
A chance of showers. Mostly cloudy, with a high near 64.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 48.
Friday
Mostly cloudy, with a high near 59. Breezy.
Friday Night
Mostly cloudy, with a low around 40.
Saturday
Mostly sunny, with a high near 54.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Zion IL
 42.45°N 87.84°W
Last Update:
10:31 am CDT Oct 11, 2026
Forecast Valid:
11am CDT Oct 11, 2026-6pm CDT Oct 17, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation